Step * 1 1 1 of Lemma implies-le-face-lattice-join


1. Type@i'
2. eq EqDecider(T)@i
3. Point(face-lattice(T;eq)) ⊆fset(fset(T T))
4. Point(face-lattice(T;eq))@i
5. Point(face-lattice(T;eq))@i
6. Point(face-lattice(T;eq))@i
7. ∀s:fset(T T). (s ∈  ((↑ac-covers(union-deq(T;T;eq;eq);x;s)) ∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))))@i
8. fset(T T)@i
9. s ∈ z@i
10. (↑ac-covers(union-deq(T;T;eq;eq);x;s)) ∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))
⊢ ↑ac-covers(union-deq(T;T;eq;eq);lub(λs.fset-contains-none(union-deq(T;T;eq;
                                                                      eq);s;x.face-lattice-constraints(x));x;y);s)
BY
((All (RWO "fl-point-sq") THENA Auto)
   THEN (RepUR ``fset-constrained-ac-lub`` THEN BLemma `fset-ac-lub-covers`)
   THEN Auto) }


Latex:


Latex:

1.  T  :  Type@i'
2.  eq  :  EqDecider(T)@i
3.  Point(face-lattice(T;eq))  \msubseteq{}r  fset(fset(T  +  T))
4.  x  :  Point(face-lattice(T;eq))@i
5.  y  :  Point(face-lattice(T;eq))@i
6.  z  :  Point(face-lattice(T;eq))@i
7.  \mforall{}s:fset(T  +  T)
          (s  \mmember{}  z  {}\mRightarrow{}  ((\muparrow{}ac-covers(union-deq(T;T;eq;eq);x;s))  \mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);y;s))))@i
8.  s  :  fset(T  +  T)@i
9.  s  \mmember{}  z@i
10.  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);x;s))  \mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);y;s))
\mvdash{}  \muparrow{}ac-covers(union-deq(T;T;eq;
                                              eq);lub(...;x;y);s)


By


Latex:
((All  (RWO  "fl-point-sq")  THENA  Auto)
  THEN  (RepUR  ``fset-constrained-ac-lub``  0  THEN  BLemma  `fset-ac-lub-covers`)
  THEN  Auto)




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